Eerie Interlude [Shadows over Innistrad Prerelease Promos] Alchemy where X is that card's

where X is that card's mana value

Set: Antiquities Type: Artifact Rarity: Rare Cost: {1} {X}

Whenever a creature enters the battlefield

Set: Worldwake Type: Creature — Kor Artificer Rarity: Rare Cost: {1}{W} When Stoneforge Mystic enters the battlefield

Tuknir often discovers himself in the most unusual physical realms

Eerie Interlude [Shadows over Innistrad Prerelease Promos] Alchemy where X is that card'sSet: Shadows over Innistrad Prerelease Promos Type: Instant Rarity: Rare Cost: {2}{W} Exile any number of target creatures you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step. The barrier between existence and oblivion is thinner than you know.